242151974821 has 8 divisors (see below), whose sum is σ = 257065657344. Its totient is φ = 227312675520.

The previous prime is 242151974803. The next prime is 242151974843. The reversal of 242151974821 is 128479151242.

242151974821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242151974821 - 2⁵ = 242151974789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242151974881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18589095 + ... + 18602116.

It is an arithmetic number, because the mean of its divisors is an integer number (32133207168).

Almost surely, 2^242151974821 is an apocalyptic number.

It is an amenable number.

242151974821 is a deficient number, since it is larger than the sum of its proper divisors (14913682523).

242151974821 is a wasteful number, since it uses less digits than its factorization.

242151974821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37191611.

The product of its digits is 322560, while the sum is 46.

The spelling of 242151974821 in words is "two hundred forty-two billion, one hundred fifty-one million, nine hundred seventy-four thousand, eight hundred twenty-one".